Robbie Coltrane stars as Fitz, a brilliant but flawed, wise-cracking criminal psychologist who looks behind the evidence of a murder to discover what lies within the criminal mind. Fitz is arrested for breach of the peace outside his in-laws' house and is taken to the station, where he meets Sean and his partner Tina (Susan Lynch). After stealing a car, the pair embark on a spree of violence. Whilst on their spree of violence, Tina and Sean (Andrew Tiernan) murder D.S Briggs. After a visit with his wife, Fitz turns down D.S Penhaligon's (Geraldine Somerville) offer of a bed for the night and soon finds himself approached by Tina who asks him to accompany her to her flat. But only time will tell if Fitz is in control of the situation!